A large capacity drying drum for high volume continuous asphalt mixing plants

Abstract

The utility model belongs to the field of drying cylinder especially, a kind of large-capacity drying cylinder for large output continuous asphalt mixing station, including drying cylinder body, the top left side of drying cylinder body is equipped with feed hopper, the bottom right side of drying cylinder body is equipped with discharge pipe, the top right side of drying cylinder body is equipped with exhaust pipe, the outside of drying cylinder body is equipped with heating jacket for drying;The left side of the right side inner wall of drying cylinder body is rotatably installed with rotating sleeve with left opening, rotating sleeve left end extends to the outside of drying cylinder body, spiral pushing plate is sleeved on rotating sleeve, connecting frame is installed on the left side of drying cylinder body, and connecting sleeve is fixedly installed on connecting frame.The utility model design is reasonable, and the problem of uneven heating of raw materials is solved by the double heating of heating jacket and adjustable hot air, raw materials are continuously conveyed by the aid of spiral pushing, hot air output can be adjusted according to asphalt particle size, and the purpose of adapting to different specifications raw material drying needs.

Description

Technical Field

[0001] This utility model relates to the field of drying drum technology, and in particular to a large-capacity drying drum for large-volume continuous asphalt mixing plants. Background Technology

[0002] In highway construction and maintenance projects, continuous asphalt mixing plants are one of the core pieces of equipment. They continuously dry and heat sand and gravel aggregates and mix them with asphalt to form asphalt mixtures. The drying drum is a key component of the mixing plant, and its capacity and drying efficiency directly determine the output and quality of the mixture.

[0003] However, most current high-volume asphalt mixing plants use a single heating jacket or a single hot air drying structure for their drying drums. When relying solely on the heating jacket, the raw materials inside the drying drum are heated unevenly, with the raw materials near the drum wall being over-dried and the raw materials in the center not being dried sufficiently. When relying solely on hot air drying, the hot air is scattered inside the drum, resulting in low contact efficiency with the raw materials. Furthermore, the hot air output cannot be adjusted according to the size of the asphalt particles, leading to significant differences in drying effects for raw materials of different specifications. Therefore, we propose a large-capacity drying drum for high-volume continuous asphalt mixing plants to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a large-capacity drying drum for high-volume continuous asphalt mixing plants.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A large-capacity drying drum for a high-volume continuous asphalt mixing plant includes a drying drum body. A feed hopper is installed on the top left side of the drying drum body, a discharge pipe is installed on the bottom right side of the drying drum body, and an exhaust pipe is installed on the top right side of the drying drum body. A heating jacket for drying is fitted onto the outer side of the drying drum body. A rotating sleeve with an opening on the left side is rotatably installed on the right inner wall of the drying drum body, with its left end extending to the outer side of the drying drum body. A spiral pusher plate is fitted onto the rotating sleeve. A connecting frame is installed on the left side of the drying drum body, and a connecting sleeve is fixedly installed on the connecting frame. The connecting sleeve penetrates the connecting frame, and the left end of the rotating sleeve is rotatably and sealed within the connecting sleeve. A hot air blower is installed at the bottom of the connecting frame, and the air outlet of the hot air blower is connected to the connecting sleeve via a connecting hose. Multiple air guide holes are evenly spaced on the inner wall of the rotating sleeve.

[0006] Preferably, a servo motor is fixedly installed on one side of the connecting frame, and a drive mechanism is provided between the servo motor and the rotating sleeve.

[0007] Preferably, the driving mechanism includes a driving gear and a driven gear. The driving gear is fixedly mounted on the output shaft of the servo motor, and the driven gear is fixedly sleeved on the rotating sleeve, with the driving gear meshing with the driven gear.

[0008] Preferably, multiple annular plates are slidably installed inside the rotating sleeve, and the annular plates are adapted to the corresponding air guide holes.

[0009] Preferably, the same connecting rod is installed on the top and bottom inner walls of the annular plate, and the same crossbar is installed on multiple connecting rods.

[0010] Preferably, the right end of the rotating sleeve has a threaded hole, and an adjusting screw is installed in the threaded hole. One end of the adjusting screw is rotatably mounted on the corresponding connecting rod, and the other end of the adjusting screw extends to the right side of the drying cylinder body and is fixedly mounted with a knob.

[0011] Preferably, a guide hole is provided at the right end of the drying cylinder body, and the adjusting screw passes through the guide hole through the drying cylinder body. A rotating groove is provided on the right side of the connecting rod located on the far right. An annular groove is provided on the inner wall of the rotating groove. An annular seat is installed on the left side of the adjusting screw, and the annular seat is rotatably connected to the annular groove.

[0012] Preferably, a controller is installed on the right side of the connecting frame, and the hot air blower, servo motor and heating jacket are electrically connected to the controller.

[0013] The beneficial effects of this utility model are: 1. The outer wall of the drying cylinder is heated by the heating jacket on the outside of the main body, and hot air is blown to the raw material through the air guide hole inside the rotating jacket, achieving dual heating inside and outside. This effectively solves the problem of uneven heating in existing drying cylinders and improves the drying quality of raw materials. 2. By rotating the knob, the adjusting screw is moved, which in turn pushes the annular plate to adjust the opening size of the air guide hole. The hot air output can be flexibly adjusted according to the size of the asphalt particles, preventing small particles from entering the rotating sleeve, while ensuring that large particles are in full contact with the hot air, thus adapting to the drying needs of different specifications of raw materials. 3. The servo motor drives the rotating sleeve and the spiral pusher plate to rotate through the drive mechanism. The spiral pusher plate can stably push the raw material from left to right to realize the continuous conveying of raw materials, meet the production needs of large-scale continuous asphalt mixing plants, and avoid raw material accumulation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a large-capacity drying drum for a large-volume continuous asphalt mixing plant proposed in this utility model. Figure 2 This is a cross-sectional structural diagram of a large-capacity drying drum for a large-volume continuous asphalt mixing plant proposed in this utility model. Figure 3 This is a partial three-dimensional structural diagram of a large-capacity drying drum for a large-volume continuous asphalt mixing plant proposed in this utility model. Figure 4 This is a schematic diagram of part A of a large-capacity drying drum for a large-volume continuous asphalt mixing plant proposed in this utility model.

[0015] In the diagram: 101, Drying cylinder body; 102, Feed hopper; 103, Discharge pipe; 104, Exhaust pipe; 105, Heating jacket; 201, Rotating sleeve; 202, Spiral pusher plate; 203, Connecting frame; 204, Connecting sleeve; 205, Hot air blower; 206, Connecting hose; 207, Air guide hole; 301, Driven gear; 302, Servo motor; 303, Drive gear; 401, Annular plate; 402, Connecting rod; 403, Crossbar; 501, Threaded hole; 502, Adjusting screw; 503, Knob; 504, Guide hole. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0017] This application discloses a large-capacity drying drum for a high-volume continuous asphalt mixing plant.

[0018] Reference Figure 1-4 A large-capacity drying drum for a high-volume continuous asphalt mixing plant includes a drying drum body 101, which is a horizontally arranged cylindrical structure. A feed hopper 102 for raw material input is welded and fixed to the top left side of the drying drum body 101, and the feed hopper 102 communicates with the inner cavity of the drying drum body 101. A discharge pipe 103 for discharging dried raw materials is welded and fixed to the bottom right side of the drying drum body 101, and the discharge pipe 103 communicates with the inner cavity of the drying drum body 101. An exhaust pipe 104 for discharging drying exhaust gas is welded and fixed to the top right side of the drying drum body 101, and the exhaust pipe 104 communicates with the inner cavity of the drying drum body 101. A heating jacket 105 for drying is fitted onto the outside of the drying drum body 101. The heating jacket 105 is a ring-shaped electric heating structure, and its inner wall is in contact with the outer wall of the drying drum body 101. The heating temperature of the heating jacket 105 can be adjusted by a controller to heat the outer wall of the raw materials inside the drying drum body 101.

[0019] In this embodiment, a rotating sleeve 201 with an opening on the left is rotatably installed on the inner right side of the drying cylinder body 101. The rotating sleeve 201 is a cylindrical hollow structure with its left end extending to the outer side of the drying cylinder body 101. The contact position between the rotating sleeve 201 and the drying cylinder body 101 is sealed by a sealing ring to prevent hot air leakage. A spiral pusher plate 202 is welded and fixed on the outer wall of the rotating sleeve 201. The spiral pusher plate 202 is evenly distributed along the axial direction of the rotating sleeve 201 and is used to push the raw material in the drying cylinder body 101 from left to right to achieve continuous conveying.

[0020] In this embodiment, a connecting frame 203 is welded and fixed to the left side of the drying cylinder body 101. The connecting frame 203 is an L-shaped steel structure. A connecting sleeve 204 is fixedly installed on the connecting frame 203 by bolts. The connecting sleeve 204 is a cylindrical hollow structure. Its axis coincides with the axis of the rotating sleeve 201, and the connecting sleeve 204 passes through the horizontal section of the connecting frame 203. The left end of the rotating sleeve 201 is installed in the connecting sleeve 204 through a sealed bearing to ensure a sealed connection between the connecting sleeve 204 and the rotating sleeve 201.

[0021] In this embodiment, a hot air blower 205 is fixedly installed at the bottom of the connecting frame 203 by bolts. The air outlet of the hot air blower 205 is connected to the left end of the connecting sleeve 204 through a high-temperature resistant connecting hose 206. The hot air generated by the hot air blower 205 can enter the rotating sleeve 201 through the connecting hose 206 and the connecting sleeve 204 in sequence. Multiple air guide holes 207 are evenly spaced on the inner wall of the rotating sleeve 201. The air guide holes 207 are evenly distributed along the circumference and axial direction of the rotating sleeve 201. The hot air in the rotating sleeve 201 can be blown to the raw material in the drying cylinder body 101 through the air guide holes 207 to achieve hot air heating of the raw material.

[0022] In this embodiment, a servo motor 302 is fixedly installed on one side of the connecting frame 203 by bolts. The output shaft of the servo motor 302 faces the rotating sleeve 201. A driving mechanism is provided between the servo motor 302 and the rotating sleeve 201. The driving mechanism includes a driving gear 303 and a driven gear 301. The driving gear 303 is fixedly installed on the output shaft of the servo motor 302 by a key connection. The driven gear 301 is fixedly sleeved on the outer side of the left end of the rotating sleeve 201 by a key connection. The driving gear 303 and the driven gear 301 mesh with each other. After the servo motor 302 is started, it can drive the rotating sleeve 201 to rotate through the driving gear 303 and the driven gear 301, thereby driving the spiral pusher plate 202 to rotate to transport raw materials.

[0023] In this embodiment, multiple annular plates 401 are slidably installed inside the rotating sleeve 201. The number of annular plates 401 is adapted to the number of axial air guide holes 207 in the rotating sleeve 201. The outer diameter of the annular plates 401 matches the inner diameter of the rotating sleeve 201. The inner wall of the annular plates 401 slides against the inner wall of the rotating sleeve 201, and the annular plates 401 are adapted to the corresponding air guide holes 207. By axially moving the annular plates 401 inside the rotating sleeve 201, the air guide holes 207 can be blocked or exposed, thereby adjusting the opening size of the air guide holes 207 to accommodate asphalt materials of different particle sizes. Larger particles correspond to larger openings of the air guide holes 207 to ensure sufficient contact of hot air; smaller particles correspond to smaller openings of the air guide holes 207 to prevent the material from entering the rotating sleeve 201.

[0024] In this embodiment, the same connecting rod 402 is welded and fixed to the top and bottom inner walls of the annular plate 401. The connecting rod 402 is a cylindrical structure. The right ends of multiple connecting rods 402 are welded and fixed to the same crossbar 403. The crossbar 403 is a horizontally arranged cylindrical structure. The crossbar 403 can synchronously drive the multiple connecting rods 402 and the annular plate 401 to move. The right end of the rotating sleeve 201 is provided with a threaded hole 501. The threaded hole 501 is arranged along the axis of the rotating sleeve 201. An adjusting screw 502 is installed on the internal thread. The left end of the adjusting screw 502 is rotatably mounted on the right side wall of the rightmost connecting rod 402 via a bearing. The right end of the adjusting screw 502 extends to the right side of the drying cylinder body 101 and is fixedly welded with a knob 503. Rotating the knob 503 can drive the adjusting screw 502 to move axially along the threaded hole 501, thereby pushing the crossbar 403, the connecting rod 402 and the annular plate 401 to slide within the rotating sleeve 201, thereby adjusting the opening size of the air guide hole 207.

[0025] In this embodiment, a guide hole 504 is provided at the right end of the drying cylinder body 101. The axis of the guide hole 504 coincides with the axis of the adjusting screw 502, and the adjusting screw 502 passes through the drying cylinder body 101 through the guide hole 504. The guide hole 504 guides the movement of the adjusting screw 502. A rotating groove is provided on the right side of the connecting rod 402 located on the far right. The rotating groove is a circular groove with an annular groove on its inner wall. An annular seat is welded and fixed on the left side of the adjusting screw 502. The annular seat is embedded in the annular groove and rotatably connected to the annular groove, ensuring that the adjusting screw 502 can push the connecting rod 402 to move when it rotates, but does not drive the connecting rod 402 to rotate.

[0026] In this embodiment, a controller is fixedly installed on the right side of the connecting frame 203 by bolts. The controller is a PLC controller, and the hot air blower 205, servo motor 302 and heating jacket 105 are all electrically connected to the controller through wires. The controller can set the wind speed of the hot air blower 205, the rotation speed of the servo motor 302 and the temperature of the heating jacket 105 to realize the automated control of the drying process.

[0027] The working principle of this utility model is as follows: the asphalt raw material to be dried is fed into the drying cylinder body 101 through the feed hopper 102. The raw material falls to the bottom left side of the drying cylinder body 101. The controller sets the temperature of the heating jacket 105, the wind speed of the hot air blower 205, and the rotation speed of the servo motor 302. The controller controls the heating jacket 105 to be energized and heated. The hot air blower 205 starts to generate hot air. The servo motor 302 starts and drives the rotating sleeve 201 to rotate through the drive gear 303 and the driven gear 301. The rotating sleeve 201 drives the spiral pusher plate 2. 02 rotates, and the spiral pusher plate 202 pushes the raw material to move slowly from left to right. The heating jacket 105 heats the raw material through the outer wall of the drying cylinder body 101. At the same time, the hot air generated by the hot air blower 205 enters the rotating sleeve 201 through the connecting hose and connecting sleeve 204 in sequence, and then blows onto the raw material through the air guide hole 207 to achieve hot air heating and drying. The dried raw material is discharged through the discharge pipe 103 and enters the subsequent mixing process. The waste gas generated during drying is discharged through the exhaust pipe 104 and meets the emission standards after being filtered by the activated carbon filter element. If the raw material particles are large, turn the knob 503 to move the adjusting screw 502 to the left, pushing the crossbar 403, connecting rod 402 and annular plate 401 to slide to the left, increasing the opening of the air guide hole 207 to ensure that the hot air fully contacts the raw material; if the raw material particles are small, turn the knob 503 in the opposite direction, and the annular plate 401 slides to the right, reducing the opening of the air guide hole 207 to prevent the raw material from entering the rotating sleeve 201.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A large-capacity drying drum for a high-volume continuous asphalt mixing plant, characterized in that, The device includes a drying cylinder body (101), a feed hopper (102) installed on the top left side of the drying cylinder body (101), a discharge pipe (103) installed on the bottom right side of the drying cylinder body (101), an exhaust pipe (104) installed on the top right side of the drying cylinder body (101), and a heating jacket (105) for drying is fitted on the outside of the drying cylinder body (101). A rotating sleeve (201) with an opening on the left side is rotatably installed on the inner wall of the right side of the drying cylinder body (101). The left end of the rotating sleeve (201) extends to the outside of the drying cylinder body (101). A spiral pusher plate (202) is fitted on the rotating sleeve (201). A connecting frame (203) is installed on the left side of the drying cylinder body (101). A connecting sleeve (204) is fixedly installed on the connecting frame (203). The connecting sleeve (204) penetrates the connecting frame (203). The left end of the rotating sleeve (201) is sealed and rotatably installed inside the connecting sleeve (204). A hot air blower (205) is installed at the bottom of the connecting frame (203). The air outlet of the hot air blower (205) is connected to the connecting sleeve (204) through a connecting hose (206). Multiple air guide holes (207) are evenly spaced on the inner wall of the rotating sleeve (201).

2. A large-capacity drying drum for a high-volume continuous asphalt mixing plant according to claim 1, characterized in that, A servo motor (302) is fixedly installed on one side of the connecting frame (203), and a drive mechanism is provided between the servo motor (302) and the rotating sleeve (201).

3. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 2, characterized in that, The drive mechanism includes a drive gear (303) and a driven gear (301). The drive gear (303) is fixedly mounted on the output shaft of the servo motor (302), and the driven gear (301) is fixedly sleeved on the rotating sleeve (201). The drive gear (303) meshes with the driven gear (301).

4. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 1, characterized in that, Multiple annular plates (401) are slidably installed inside the rotating sleeve (201), and the annular plates (401) are adapted to the corresponding air guide holes (207).

5. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 4, characterized in that, The same connecting rod (402) is installed on the top and bottom inner walls of the annular plate (401), and the same crossbar (403) is installed on multiple connecting rods (402).

6. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 1, characterized in that, The rotating sleeve (201) has a threaded hole (501) at the right end. An adjusting screw (502) is installed in the threaded hole (501). One end of the adjusting screw (502) is rotatably installed on the corresponding connecting rod (402). The other end of the adjusting screw (502) extends to the right side of the drying cylinder body (101) and is fixedly installed with a knob (503).

7. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 6, characterized in that, The right end of the drying cylinder body (101) is provided with a guide hole (504), and the adjusting screw (502) passes through the drying cylinder body (101) through the guide hole (504). The right side of the connecting rod (402) located on the far right is provided with a rotating groove, and an annular groove is provided on the inner wall of the rotating groove. An annular seat is installed on the left side of the adjusting screw (502), and the annular seat is rotatably connected to the annular groove.

8. A large-capacity drying drum for a large-scale continuous asphalt mixing plant according to claim 1, characterized in that, A controller is installed on the right side of the connecting frame (203), and the hot air blower (205), servo motor (302) and heating jacket (105) are electrically connected to the controller.

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